Max inventory slots? ( Backpack SDU )

I've been looking around for a definitive answer on this, but there are several conflicting answers, so I have a few questions:

1) What is the maximum amount of inventory slots you can get in both playthroughs, including all 4 DLCs?I have heard 63, and 72 as answers here, as well as the more confusing answer - 12(start)+30(PT1)+15(PT2)+9(DLCs) = 66 slots.So which one is it?

2) Does it pose any risk to my save file if I use the "Sign Out" trick to avoid receiving grenade upgrades and just SDUs?

3) If the first question is answered I don't really need to ask, but can you get SDU upgrades from more than 5 ClapTraps on Playthrough 2(Including DLCs)?

---meh

#2devak108Posted 1/16/2011 7:37:47 AM

The correct number is 72. The wiki explains it all here:

http://borderlands.wikia.com/wiki/Storage_Deck_Upgrade

---"That's Medicinal!"

#3drake_skullPosted 1/16/2011 10:38:49 AM

I had no trouble(I dashboarded when I didn't get the SDU) so I don't think you will have any trouble. You can only get the first 5 SDUs in PT2(skipping Kroms Canyon, Tetanus Warrens is the last one) and 1 from Zombie DLC and Claptrap DLC. Knoxx will not cough up a second SDU. If you are in fear of your save being damaged you could use a USB stick to backup your save so in case the worst happens you can recover with little to no loss.---WC2010 FC 1291 1684 6591 Name: ManiakAll I remember is a very mean kitten and now we are in this Janitors closet and my throat hurts alot